These drill bits are cutting tools used to remove material to create holes with a circular cross section. There are many sizes for your choice and can create different types of holes in many different materials. Attached to a drill bit that allows them to rotate through the workpiece. To extend its lifespan, better use with water for cooling and lubrication. The drill bit can be used with drill bit, electric hand drill. Size:35mmThese drill bits are cutting tools used to remove material to create holes of circular cross section.There are many sizes for your choice and can create different types of holes in many different materials.Attachedàa drill that allows them to pass through the part by rotation.Features: Color: Gold Size (optional): 6/8/10/14/16/18/20/22/25/30/35 / 50mm 0.24 / 0.31/ 0.39 / 0.55 / 0.63 / 0.71 / 0.79 / 0.87 / 0.98 / 1.18 / 1.37 / 1.96 inch quantity: 1 Instruction: 1, To extend its life, better use with water for cooling and lubrication.2, the drill bit can be usedwith drill bit, electric drill bithand.3, When using an electric drillhand, slowly start to moveat a 45 degree angle and increase vertically after marking the angle.an initial mark.Package includes: 1 diamond drill bit Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.